org-manual: Fix typo in variable name

doc/org-manual.org

@@ -6399,7 +6399,7 @@ prompted about what to do with it.
 
      #+cindex: @samp{CLOCK_MODELINE_TOTAL}, property
      #+cindex: @samp{LAST_REPEAT}, property
-     #+vindex: org-clock-modeline-total
+     #+vindex: org-clock-mode-line-total
      #+vindex: org-clock-in-prepare-hook
      While the clock is running, Org shows the current clocking time
      in the mode line, along with the title of the task.  The clock
@@ -21023,7 +21023,7 @@ this to ~org-clock-in-prepare-hook~.
 [fn:73] The last reset of the task is recorded by the =LAST_REPEAT=
 property.
 
-[fn:74] See also the variable ~org-clock-modeline-total~.
+[fn:74] See also the variable ~org-clock-mode-line-total~.
 
 [fn:75] The corresponding in-buffer setting is: =#+STARTUP:
 lognoteclock-out=.

doc/org.texi

@@ -7065,7 +7065,7 @@ clock stopped.
 
 @cindex @samp{CLOCK_MODELINE_TOTAL}, property
 @cindex @samp{LAST_REPEAT}, property
-@vindex org-clock-modeline-total
+@vindex org-clock-mode-line-total
 @vindex org-clock-in-prepare-hook
 While the clock is running, Org shows the current clocking time
 in the mode line, along with the title of the task.  The clock
@@ -7079,7 +7079,7 @@ the @samp{CLOCK_MODELINE_TOTAL} property.  It may have the values
 @samp{current} to show only the current clocking instance, @samp{today} to
 show all time clocked on this tasks today---see also the
 variable @code{org-extend-today-until}, @code{all} to include all time, or
-@code{auto} which is the default@footnote{See also the variable @code{org-clock-modeline-total}.}.  Clicking with
+@code{auto} which is the default@footnote{See also the variable @code{org-clock-mode-line-total}.}.  Clicking with
 @kbd{mouse-1} onto the mode line entry pops up a menu with
 clocking options.